Pitman.



- f JOSEPH 'w. STORM, or cosrroo'ron, OHIO.

PITMAN.

Specification of Letters Patent.

Application filed October 11,1916. serial'no. 125,066.-

To all wkom ilk may concern:

' Be it'known that I, JOSEPH W. STORM,'B. citizen of the United States, residing at Coshocton, in the countyof Cos'hoctonand State of Ohio, have invented certain new and useful Improvements in Pitmen, of which the following is a specification.

This invention relates to an improved .pitman and the principal object of the inven-.

tion is to provide improved means for connecting the pitman with the driving disk which will .of course be rotatably mounted and to further provide improved means for lubricating the pitman. 7 Another object of the invention isto'provide ain improvedtype of bushing fitting within the itman head and about the pivot pin for the pitman, the bushingbeing so constructed that it will be held against rotary movement within the pitman head.

Another objectof the invention is to provide an'improved type of; securing means for the nuts holding the pitman upon the pivot pin or stub shaft, the locking means being so mounted that it may be releasably held in an inoperative position.

Another object of the invention is to so construct the stub shaft that it may be releasably connected with the driving disk.

This invention is illustrated in the accompanying drawings, wherein Figure 1 1s a view 1n elevation showing a fragment ofthe driving disk and one end portion of the pitman connected therewith. Fig. 2 is a sectional view taken along the line 22 of Fig. 1, with the stub shaft shown partially in elevation.

Fig. 3 is a sectional view through one end of, the pitman takenalong theline 33 of Fig. 2.

Fig. 4: is a fragmentary sectional view taken along the line-H of Fig. 3, one portion of the stub shaft being shown in plan. The driving disk 10, a fragment of which is shown will be rotated in any suitable mannet and is provided with a threaded opening 11 in which the threaded inner end portion 12 of the stub shaft 13 is screwedand securely held in place by. means of the set screw 14. This stub shaft is tapered longitudinally and terminates in a threaded outer end portion 15 having longitudinally extending grooves 16 formed therein. From an inspection of Fig. 2 it will be readily seen that when the stub shaft becomes worn, the set screw 14 can be loosened and the stub shaft then removed from the: driving disk and a new stub shaft putv inplace.

The pitman.17 is provided with-a. head '18 having a passage- 19. formed therein to receive the stub shaft 13, a bushing v20 being of any suitable material and is provided with bottom openings22 and side openings 23 through which lubricating oil may pass to lubricate the stub shaft and permit the stub shaft to turn easily in the bushing. A spacing washer 24 is provided to hold the head of the pitman in spaced relation to the driving disk 10 and thus permit the pitman to move freely. A pocket 25 is formed in the" pitman head about therbottom and side portions thereof as shown in Fig. 3 and is provided with an inlet neck 26 to permit lubricant to be poured into the pocket. pitman moves longitudinally and the stub shaft rotates inthe bushing,- the lubricant in. the pocket will feed through the openings 22 and 23 to lubricate the stub shaft.

When in use, the stub shaft is screwed into the threaded opening -11 of the driving disk and the pitman is then placed upon the stub shaft and engages the spacing washer previously placed upon the stub shaft. The securing nut 27 is then screwed upon the threaded outer end portion of the stub shaft, the locking pin 28 being drawn outwardly by means of the ring 29 and then turned so that the ring will rest upon the strips It will thus be seen that as the Patented oats, 19 's.

30 to hold the locking in in the inoperative position. After the nut has been tightened the desired amount, the pin will be again turned to the position shown in full lines and the ring will pass between the strips 30 thus permitting the head '31 to fit into one of the grooves 16. Of course, it is under stood that as many grooves 16 as desired may be provided. The spring 32 releasably holds the locking pin in the operative position and therefore the nut will be securely but releasably held in place and prevented from working loose as the pitman moves.

As previously-explained, the lubricant will be poured into the pocket-and the stub shaft will be lubricated from the bottom and side portions instead of from the top as is usually the case thus preventing waste of the lubricant.

lat is claimedis A'deVice of the character described comprising'a driving element, astub shaftvextending-from said driving element, a pitr'nan provided with a transversely extending '.passage through which said stub shaft extends to rotatably mount the pitman and with side pockets leading from the-passage,

a bushing in the passage of the pitnian havingside lugs fitting into the pockets to prevent rotation of the bushing, the bottom portion and oneside portion of the bushing being provided with lubricant passages, the pitman being provided with a lubricant aeaeee pocket extending longitudinally of the. peri forated portion of said bushing, a disk upon In testimony whereof I afix my signature I in presence of two Witnesses.

JOSEPH W. STORM. Witnesses:

(OLIVER BRETzINs, H; S. 'RINE ART. 

